The NRF 24L01+ radio transceiver can be found in a lot of wireless project builds. But it's only meant to work at a range of a few meters. [Achu Wilson] found that he could greatly extend the range by as much as 2 kilometers. All he needed to do was build this high-gain antenna. He already had an idea of what he wanted to use the RF link for, so a directional antenna is no a problem. He chose … [Read more...]